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A magma chamber is a large pool of liquid rock beneath the surface of the Earth. The molten rock, or magma, in such a chamber is less dense than the surrounding country rock, which produces buoyant forces on the magma that tend to drive it upwards. [1] If the magma finds a path to the surface, then the result will be a volcanic eruption ...
Lassen Peak's northeastern face. Lassen Peak lies near the southern end of the Cascade Volcanic Arc, at the western edge of the Basin and Range Province. Like other Cascade volcanoes, it was fed by magma chambers produced by the subduction of the oceanic Juan de Fuca tectonic plate under the western edge of the continental North American ...
The Yellowstone Caldera, sometimes referred to as the Yellowstone Supervolcano, is a volcanic caldera and supervolcano in Yellowstone National Park in the Western United States. The caldera and most of the park are located in the northwest corner of the state of Wyoming. The caldera measures 43 by 28 miles (70 by 45 kilometers), and postcaldera ...
Volcanic and igneous plumbing systems (VIPS) consist of interconnected magma channels and chambers through which magma flows and is stored within Earth's crust. [ 1] Volcanic plumbing systems can be found in all active tectonic settings, such as mid-oceanic ridges, subduction zones, and mantle plumes, when magmas generated in continental ...
Magma chamber) Phreatic eruptions (or steam-blast eruptions) are a type of eruption driven by the expansion of steam. When cold ground or surface water come into contact with hot rock or magma it superheats and explodes, fracturing the surrounding rock [63] and thrusting out a mixture of steam, water, ash, volcanic bombs, and volcanic blocks. [64]
Lassen Volcanic National Park is a national park of the United States in northeastern California. The dominant feature of the park is Lassen Peak, the largest plug dome volcano in the world and the southernmost volcano in the Cascade Range. [3] Lassen Volcanic National Park is one of the few areas in the world where all four types of volcanoes ...
Today, the Christmas Mountains caldera complex, as well as the dome, is heavily eroded, exposing the deep structure of the complex. The complex is the type location for laccocalderas. Laccocalderas differ from conventional calderas, being relatively small and developing over thin, shallow laccolithic magma chambers rather than deeper bodies ...
This episode too was from a deep magma reservoir at between 28 and 35 km (17 and 22 mi) depth, [10] and produced a tephra volume of at least 0.63 km 3 (0.15 cu mi). [ 9 ] Poutu Episodes, an initial Blue Lake vent eruption was followed by a proto-Ngauruhoe vent eruption to the south of the present Ngauruhoe crater with a total of five layers of ...